I have a 105 kg friend who is using a 2005 Carve 161 (256 x 82 x 54.3 cm OFO) with the stock freeride 52 cm fin and a North freerace 9.5 sail. Planing as of 12 knots of constant wind. To enjoy much lighter wind below 10 knots, he's now using a Formula, 70 cm fin and a Code Red 11.0 sail.

Another 98 kg friend who was using a 2006 F-Type 148 with stock 56 cm fin and Gaastra race/freerace 9.8 sail. Planing as of 10 knots of constant wind. Using now 2007 iSonic 155 and Code Red 11.0 sail to enjoy winds lighter than 10 knots.

Another 95 kg friend who is using the Phantom Race 380 with a NP V8 9.5 sail. In low wind with the 85 cm daggerboard down, he told me that he can cruise all over the places and is faster when other guys on their Formula gear were schlogging. As soon as the wind is strong enough when the board raises over its own bow wave, it's time for him to push the daggerboard up and starts planing very easily.

So, these 3 examples above might help you to figure out what could be the best with your 9.4 sail. Several alternative to 1 m wide Formula and 70 cm fin are :